Loops | HackerRank

Goal

Solution

If you know for statement in python, it woul be very easy task.

# Loops

if __name__ == '__main__':
    n = int(input())
    
    for i in range(n):
        print(i * i)

Python: Division | HackerRank

Goal

1. Read two integers each line.

2. print (a//b) in first line.

3. print (a/b) in second line.

Solution

Use input() function to read two integer values. But don't forget to convert input return value into integer value. 

# Python: Division

if __name__ == '__main__':
    a = int(input())
    b = int(input())
    
    print(a // b)
    print(a / b)

Arithmetic Operators | HackerRank

Goal

1. Read two integers from STDIN.

2. Solve tasks to use arithmetic operators. 

Solution

You can read values by using input() function. The important thing is to convert input() value into integer type because Input() function returns string value from input. 

After read two integer values, you can calculate vaules for each task.

# Arithmetic Operators

if __name__ == '__main__':
    a = int(input())
    b = int(input())
    
    sum = a + b
    difference = a - b
    product = a * b
    
    print(sum)
    print(difference)
    print(product)

Python If-Else | HackerRank

Goal

You need to print "Weird" if the number is weird in under condition. Otherweise, print "Not Weird". 

Solution

You can follow what conditions say, then it would be easy.

# Python If-Else

import math
import os
import random
import re
import sys


if __name__ == '__main__':
    n = int(input().strip())
    
    if (n % 2) !=0 : 
        print('Weird')
    else:
        if (n >=2 and n <=5):
            print('Not Weird')
        
        elif (n >=6 and n <=20):
            print('Weird')
            
        else:
            print('Not Weird')

Say "Hello, World!" With Python | HackerRank

Goal

Print "Hello, World!" to stdout. 

Solution

You can use print function to print the specificed message. 

# Say "Hello, World!" With Python

if __name__ == '__main__':
    print("Hello, World!")

Input and Output | HackerRank

Goal

Read 3 numbers from stdin and print their sum to stdout

Solution

This challenge is to practice reading input from stdin(standard input stream) and printing out to stdout(standard output stream).

// Input and Output

#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    int a, b,c ;
    int result = 0;
    cin >> a >> b >> c;
    result = a + b + c;
    cout << result << endl;
    return 0;
}

Say "Hello, World!" With C++ | HackerRank

Goal

Solution

This is simple challenge to print "Hello, World!" to stdout. We can use easily an object of class iostream. "std::cout."

// Say "Hello, World!" With C++

#include <iostream>
#include <cstdio>
using namespace std;

int main() {

    cout << "Hello, World!" << endl;
    return 0;
}